Apart from being pretty slow, I don't think Jira really sucks once a) it is configured to your needs b) you know how to use it (which should be fairly easy with a in place). Which goes for pretty much any tool more complicated than notepad, so to speak: it's not like the other similar tools out there are much better, just different, imo. Though I have the impression a lot of people who think Jira sucks might be using it where they actually don't need it because much simpler tools could suffice in their particular situation.